I guess I'll create a sticky on this, but it will most likely get passed by there as well.

If it's not the fuse, then check the trailer wiring connector on the lower left hand side of your rear bumper for any possible shorted wiring (doubtful, unless you do have a blown fuse). Also examine the brake switch located near the top of the brake pedal shaft.

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I figure I am going to meet a buddy here in an hour and try his test light on the fuses. This wears me out, I love this 2008 F150, it is my second one. Well on way home last night, I get stopped for no brakelights by texas dps and I was shocked since I had just replaced all tail lights this past friday. I even showed him the receipt. His response is step out back to rear of truck and let me show you, he steps on brake pedal and nothing. He loaned me his flash light and I look at fuses and all looks normal. check owners manual for any fuse related to lights and they look normal. nothing burned, nothing missing, so I think next step is brake light switch?

well I replaced my brake light switch and all is good....dont buy from oreillys, they will have correct part number but it does not work. it is a borg warner part they sell and it is does not plug in. I had to go to ford to get it. it was like $30.00 and all is good again...